require 'test_helper'

module ActiveModel
  class Serializer
    module Adapter
      class JsonApi
        class TopLevelJsonApiTest < ActiveSupport::TestCase
          def setup
            @author = Author.new(id: 1, name: 'Steve K.')
            @author.bio = nil
            @author.roles = []
            @blog = Blog.new(id: 23, name: 'AMS Blog')
            @post = Post.new(id: 42, title: 'New Post', body: 'Body')
            @anonymous_post = Post.new(id: 43, title: 'Hello!!', body: 'Hello, world!!')
            @comment = Comment.new(id: 1, body: 'ZOMG A COMMENT')
            @post.comments = [@comment]
            @post.blog = @blog
            @anonymous_post.comments = []
            @anonymous_post.blog = nil
            @comment.post = @post
            @comment.author = nil
            @post.author = @author
            @anonymous_post.author = nil
            @blog = Blog.new(id: 1, name: 'My Blog!!')
            @blog.writer = @author
            @blog.articles = [@post, @anonymous_post]
            @author.posts = []
          end

          def test_toplevel_jsonapi_defaults_to_false
            assert_equal config.fetch(:jsonapi_include_toplevel_object), false
          end

          def test_disable_toplevel_jsonapi
            with_config(jsonapi_include_toplevel_object: false) do
              hash = serialize(@post)
              assert_nil(hash[:jsonapi])
            end
          end

          def test_enable_toplevel_jsonapi
            with_config(jsonapi_include_toplevel_object: true) do
              hash = serialize(@post)
              refute_nil(hash[:jsonapi])
            end
          end

          def test_default_toplevel_jsonapi_version
            with_config(jsonapi_include_toplevel_object: true) do
              hash = serialize(@post)
              assert_equal('1.0', hash[:jsonapi][:version])
            end
          end

          def test_toplevel_jsonapi_no_meta
            with_config(jsonapi_include_toplevel_object: true) do
              hash = serialize(@post)
              assert_nil(hash[:jsonapi][:meta])
            end
          end

          def test_toplevel_jsonapi_meta
            new_config = {
              jsonapi_include_toplevel_object: true,
              jsonapi_toplevel_meta: {
                'copyright' => 'Copyright 2015 Example Corp.'
              }
            }
            with_config(new_config) do
              hash = serialize(@post)
              assert_equal(new_config[:jsonapi_toplevel_meta], hash.fetch(:jsonapi).fetch(:meta))
            end
          end

          private

          def serialize(resource, options = {})
            serializable(resource, { adapter: :json_api }.merge!(options)).serializable_hash
          end
        end
      end
    end
  end
end